Derivative Instruments (tables)

6 Months Ended

Jun. 30, 2012

Summary Of Derivative Instruments Abstract

Income Statement Presentation of Derivative Instruments [Text Block]

		Three Months Ended
		June 30, 2012								June 30, 2011
Thousands			Natural gas commodity	(1)		Foreign currency	(2)		Natural gas commodity	(1)		Foreign currency(2)
Cost of sales		$	27,780		$	-		$	3,631		$	-
Other comprehensive income (loss)			-			(237)			-			(196)
Less:
Amounts deferred to regulatory accounts on balance sheet			(27,780)			237			(3,631)			196
	Total impact on earnings	$	-		$	-		$	-		$	-
		Six Months Ended
		June 30, 2012								June 30, 2011
Thousands			Natural gas commodity	(1)		Foreign currency	(2)		Natural gas commodity	(1)		Foreign currency(2)
Cost of sales		$	(28,114)		$	-		$	(30,119)		$	-
Other comprehensive income (loss)			-			(111)			-			406
Less:
Amounts deferred to regulatory accounts on balance sheet			28,114			111			30,119			(406)
	Total impact on earnings	$	-		$	-		$	-		$	-
(1)Unrealized gain (loss) from natural gas commodity hedge contracts is recorded in cost of sales and reclassified to regulatory deferral accounts on the balance sheet.
(2)Unrealized gain (loss) from foreign currency exchange contracts is recorded in other comprehensive income, and reclassified to regulatory deferral accounts on the balance sheet.

Credit Rating Downgrade Scenarios [Text Block]

				Credit Rating Downgrade Scenarios
Thousands		(Current Ratings) A+/A3		BBB+/Baa1		BBB/Baa2		BBB-/Baa3		Speculative
With Adequate Assurance Calls	$	-	$	-	$	-	$	-	$	15,342
Without Adequate Assurance Calls	$	-	$	-	$	-	$	-	$	19,222